Molecular recognition by acetylcholinesterase at the peripheral anionic site: structure–activity relationships for inhibitions by aryl carbamates
作者:Gialih Lin、Cheng-Yue Lai、Wei-Cheng Liao
DOI:10.1016/s0968-0896(99)00213-8
日期:1999.12
adduct (k2), and the bimolecular inhibition constant (k(i)) for the inhibition of Electrophorus electricus acetylcholinesterase by carbamates 1-9 and the Hammett substituent constant (sigma), are observed, and the reaction constants (ps) are -1.36, 0.35 and -1.01, respectively. Therefore, the above reaction may form a positive charged enzyme-inhibitor intermediate at the peripheral anionic site of the
取代的苯基-N-丁基氨基甲酸酯(1-9)是强力的不可逆的电泳乙酰胆碱酯酶抑制剂。氨基甲酸酯1-9通过在竞争性抑制剂edrophonium存在下的停止时间测定,充当乙酰胆碱酯酶的外围阴离子定点不可逆抑制剂。酶抑制剂加合物的解离常数(Ki),酶抑制剂加合物的失活常数(k2)和双分子抑制常数(k(i))的对数之间的线性关系,用于抑制电泳电乙酰胆碱酯酶观察到氨基甲酸酯1-9和Hammett取代基常数(sigma),反应常数(ps)分别为-1.36、0.35和-1.01。因此,